Find all points where the function has any relative extrema. Identify any saddle points. f ( x , y ) = 2x2 + 4y - 24 xy+ 23 Find the derivatives fxx, fyy, and fxy fx = . fyy = 0. fxy = 0 Identify all the relative maxima. Select the correct choice below and, if necessary, fill in the answer box to complete your choice. O A. The relative maximum point(s) is(are) (Simplify your answers. Type ordered pairs. Use a comma to separate answers as needed.) O B. There are no relative maxima Identify all the relative minima. Select the correct choice below and, if necessary, fill in the answer box to complete your choice. O A. The relative minimum point(s) is(are) (Simplify your answers. Type ordered pairs. Use a comma to separate answers as needed.) O B. There are no relative minima. Identify all the saddle points. Select the correct choice below and, if necessary, fill in the answer box to complete your choice. O A. The saddle point(s) is(are) (Simplify your answers. Type ordered pairs. Use a comma to separate answers as needed.) O B. There are no saddle points